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EC number: 221-974-5 | CAS number: 3301-94-8
Table 1: Average Exposure Concentration Versus Nominal Concentration
Test substance, Nominal conc. (mg/L)
Measured concentrations (mg/L)
Average exposure conc. (mg/L)
Table 2: Number of Introduced Daphnids and Incidence of Immobility in the Final Test
Test substanceAverage exposure conc. (mg/L)
( ) between brackets: number of daphnids observed trapped at the surface of the test solutions. These organisms were reimmersed into the respective solutions before recording of mobility.
* Oxygen concentration was 8.9 mg/L.
In a 48 h acute toxicity test conducted according to OECD guideline 202, Daphnia magna were exposed to the test item at nominal concentrations of 10, 18, 32, 56 and 100 mg/L and an untreated control (all with 4 replicates per concentration and 5 daphnids per replicate). Measured concentrations decreased to 44 - 56% relative to nominal at the end of the test. Average exposure concentrations were calculated to be 5.7, 11, 20, 34 and 64 mg/L. Immobility increased from 0% at 11 mg/L to 100% at 34 mg/L at the end of the test. The 48h-EC50 for Daphnia magna exposed to the test item was 21 mg/L, based on average exposure concentrations. The study met all validity criteria and is considered to be reliable without restrictions.
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